Yellow chrome-mordant dyestuffs and process of making same.



145 v the dyestulf is precipitated AND ERWIN I-YIOFFA, or Hoe sr-oN-THn-Miam,

HERMANN WAGNER, JOSEF ERIBER, rename, or

GERMANY, ASSIGNORS TO FARBWERKE VOB-M. MEISTER LUCIQ'S & HOCHST-ON-THE-MAIN, GERMANY, A CORPORATION OF GERMANY.

YELLOW CHROME-MORDANT nYEsTUrFs AND rnoonss or MAKING SAME.

1 149 231 Specification of Letters Patent.

N 0 Drawing.

To all whom it may concern:

Be it known that we, HERMANN WAGNER, Ph. D., JosEF YERBER, Ph. D., and ERWIN HOFFA, Ph. D., citizens of the Empire of Application filed July 6, 1914. Serial No. 849,281.

with sodium carbonate, of 254 parts of 1 (p-sulfophenyl) 3-methyl-5-pyrazolone. The dyestufi' thus obtained is salted out, filtered and dried. It corresponds to the Germany, residing at Hochst-on-the-Main, formula: Germany, have invented clertlam law and I j useful Improvements in el ow rome- Ha Mordant Dyestufis and Processes of Malr- N ifi ing Same, of which the following 1s a specl- (1,0011 7 0:0 N fication.

We have found that by combining diazol tized anthranilic acid or its substitution products with 1 phenyl-3-methyl-5-pyrazolone-sulfonic acids or a derivative thereof, valuable yellow dyestufi's are obtained I V which, when treated on the fiber witfh chrofso r! mium salts. are fixed i in the i O and is in the form of its sodium salt a yelcolor-lakes. The bodies thus obtained, 10W powder, readily soluble in Water,

which constitute sulfonic acids having the cultly soluble in alcohol, benzene, ether and nucleus:

acetone. I I

In the claims, where reference is made to I anthranilic acid it is to be understood T F that the substitntidn products thereof are 0:0 N also included as equivalents in the process; COOK and where reference is made to 1- henyll 3-methyl-5-pyrazolonsulfonic acid, it is to be understood that the derivatives thereof are also included as. equivalents in the process.

Having now described our invention What we claim is:

1. The process of manufacturing yellow chrome dyestuffs, which consists in causing the diazo compounds, from anthranilic acid wherein X stands for an arylsulfonic acid group, are in the form of their sodium salts yellow to orange powders, readily soluble in water, very diflicultly soluble in alcohol, benzene, ether and acetone, soluble in concentrated sulfuric acid with a yellowish color. The dyeings obtainable by the new dyestuffs are remarkable for their eminent fastness to carbonizing and to milling.

The following examples illustrate our in vention, the parts being by weight:

Example I: 171.5 parts of 5-chloro-2- amino-benzoic acid are diazotized in the usual manner. The diazo solution thus obf tained is run into a solution, rendered alka- J line with sodium carbonate, of 288.5 parts doon of 1 (2-chloro-5-sulfophenyl) -3-Inethy1-5pywhereinXstands for an arylsulfonic group,

razolone, and after the reaction is complete with common being in the form of their sodium salts yellow to orange powders, readily soluble in water, very diflicultly soluble in alcohol, benzene, ether and acetone, soluble in concentrated sulfuric acid with a yellowish color.

sulfonic acids. a

2. As new products, the herein described sulfonic acids having the nucleus:

nilic acid is coupled as indicated in Example I with a solution, rendered alkaline to act upon 1-phenyl-3methyl-5-pyrazolom- Patented Aug. 1c, 1915.

2 3. As a new productythe herein described lowish powder, readily soluble in water, 15 dyestufi of the formula: diificultly soluble in alcohol, benzene, ether H and acetone. 34m In testimony whereof, we afiix our signal L u a tures in presence of two witnesses.

. HERMANN WAGNER.

' J OSEF ERBER. ERWIN HOFFA. i Witnesses: v J EAN GRUND, SOaH CAnL GRUND.

being in the form of its sodium salt, a yel- 

